private void Initialize(SamplerStateDescription description)
{
var nativeDescription = new NativeSamplerStateDescription
{
Filter = Filter.ComparisonAnisotropic,
AddressU = TextureAddressMode.Wrap,
AddressV = TextureAddressMode.Wrap,
AddressW = TextureAddressMode.Wrap,
MinimumLod = float.MinValue,
MaximumLod = float.MaxValue,
MipLodBias = 0,
MaximumAnisotropy = 16,
ComparisonFunction = Comparison.Never
};
NativeSampler = Device.SamplerAllocator.Allocate(1);
Device.NativeDevice.CreateSampler(nativeDescription, NativeSampler);
}
private void PlatformConstruct(GraphicsDevice graphicsDevice, PipelineLayoutDescription description)
{
var rootParameters = new RootParameter[description.Entries.Length];
for (var i = 0; i < description.Entries.Length; i++)
{
var entry = description.Entries[i];
switch (entry.EntryType)
{
case PipelineLayoutEntryType.Resource:
rootParameters[i] = new RootParameter(
entry.Visibility.ToShaderVisibility(),
new RootDescriptor(entry.Resource.ShaderRegister, 0),
entry.ResourceType.ToRootParameterType());
break;
case PipelineLayoutEntryType.ResourceView:
rootParameters[i] = new RootParameter(
entry.Visibility.ToShaderVisibility(),
new DescriptorRange(
entry.ResourceType.ToDescriptorRangeType(),
entry.ResourceView.ResourceCount,
entry.ResourceView.BaseShaderRegister));
break;
default:
throw new System.InvalidOperationException();
}
}
var staticSamplerStates = description.StaticSamplerStates ?? new StaticSamplerDescription[0];
var staticSamplerDescriptions = new D3D12.StaticSamplerDescription[staticSamplerStates.Length];
for (var i = 0; i < staticSamplerStates.Length; i++)
{
var staticSamplerState = staticSamplerStates[i];
var samplerStateDescription = new D3D12.SamplerStateDescription
{
Filter = staticSamplerState.SamplerStateDescription.Filter.ToFilter(),
AddressU = TextureAddressMode.Wrap,
AddressV = TextureAddressMode.Wrap,
AddressW = TextureAddressMode.Clamp,
ComparisonFunction = Comparison.Always,
MinimumLod = 0,
MaximumLod = float.MaxValue,
MaximumAnisotropy = staticSamplerState.SamplerStateDescription.MaxAnisotropy
};
staticSamplerDescriptions[i] = new D3D12.StaticSamplerDescription(
samplerStateDescription,
staticSamplerState.Visibility.ToShaderVisibility(),
staticSamplerState.ShaderRegister,
0);
}
var rootSignatureDescription = new RootSignatureDescription(
RootSignatureFlags.AllowInputAssemblerInputLayout,
parameters: rootParameters,
samplers: staticSamplerDescriptions);
var serializedRootSignatureDescription = rootSignatureDescription.Serialize();
DeviceRootSignature = AddDisposable(graphicsDevice.Device.CreateRootSignature(serializedRootSignatureDescription));
}
